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United States Patent METAL-CONIAINING AZO DYESTUFFS R h d ie an Charl t i n, B s l, and Walter Wehrli, Riehen, Switzerland, assigglors toSandoz A. G., Basel, Switzerland, :1 Swiss firm No Drawing. Applicati nilune 24, 1955, se ia 'N 5 ,9

Claims'priority, application Switzerland June 25, 1954 6 Claims. (Cl, 26ll-1;45)

The present application isla continuation-in-part of the copending application Ser. No. 404,811, filed January 18, 1954, and relates to metabcontaining azo dyistutfs.

A primary object of the invention is the embodiment of metal-containing azo dyestuffs, especially of compositions of matter: consisting of such metal-containing azo dyestuffs which are suitable for the dyeing of wool, silk, leather and artificial nitrogenous fiberssuch as synthetic polyamide fibers (e. g. nylon Perlon, etc.) from neutral to weakly acid dyebaths, This object is realized by the compositions of matter according to the invention consisting of at least one asymmetrical metal-containing azo dyestufi which corresponds to the formula and the respective symmetrical metal-containing azo dyestuffs corresponding to the formulae I z stands for the radical of a disazo compound difierent from the radical y but having the same general formula or the radical of a monoazo compound which corresponds to the formula wherein R3 stands for the radical of a diazo compound of the henzene series, free from sulfonic acid groups and containing in the ortho-position to the N=N group a substituent ab .ofviormi e-me al sa ples @o o nd nd R t nd fo he r dica o a a o p u o the y ybenzene, hydroxynaphthalene, pyrazolone, acetoacetic a-cid kyl d a tpa e-a d a id and min n phth n s e r e rom s on c c up and con in ns-th -fl swap i h wh -p ion o the ra aolie r n lis yd qx gr u o a i o rou espect vely and w re g-r-th i -0 a ms s and iin th ortho-position to the -i-azo, group and thebenzene nucleus I may bear further substituents.

The compositions ofmatter according to, the, invention are obtained when (a) Two or more differentwater-solubledisazo com: pounds obtainable according to the process; described in the copending application Ser. No. 3Q4,Ql2, filed'August 12, 1952, and corresponding to the formula tioned significance, or when (b) One or morewater-soluble disaaocompounds con responding to the general Formula A andone or more monoago compoundscorresponding to the general fpr niu 1a w v a l i. V .7 Rs-N=NR5 OI- I 13) wherein R3 has the above named,significance.angliR phl lstands for the radical of an azo, componentiof the hydronyhenw zene, hydroxynaphthalene, pyrazolone alkylamide or acetoaeeti acid 'aryl sulfonic acid groups an cl con't H n g our g po ien e th N Lsrquab; Whe

- (c) One or more water-soluble disazo compounds eere p ndins t e eneral f mul -A a d o m e V monoazo compounds corresponding'to the general forrnula R3N=NRs-NH2 wh ein Rs has the above named significance and R6NH2 stands for the radical of a Z-aminonaphthalene, free from sulfonic acid groups, are treated with metal-yielding agents, preferably with chromiumor cobalt-yielding agents.

The following aminobenzenes conforming to the present definition are enumerated as examples of those suitable for producing the monoazo compounds of general Formula B; 2-a1nino-l-hydroxybenzene, Z-amino-l-hyroxy 4 halogenbenzenes, 2 amino 1 hydroxy 4- o e zeae 2 srnia l hares-say,- 4 ralls lsqltanr r bcn zenes, 2 amino 1 hydro en 6 ky a or 5 sa qni aqt s,

sulfonic acid"amide, 2 aminoml -carboxymethoxy benzene-4a or -5,- s ulfoni c acid-amide; Ihe-aminqbenbenzene sulfonicacid amides here named may-be sub stituted on the nitrogen atom of the sulfonic acidamide group y y yd'mx a ky m hoxyalky cy o ly aralkyl and/or arylradicals which maythernselves .con-,

tain further substituents. Suitable azo components are forexample: (a) hydroxybenzenes such as -1 -hydro Xy- 4 alkylbenzenes, 1 hydroxy 2.4 dialhy lbenzenes, 1-

hydroxy 2 acylaminobenzenes; (b) hydroxynaphthalene s such as 2 hydroxynaphthalene, 1.5-, 2.6- M27- dihydroxynaphthalene, 2 hydroxynaphthalenes substituted in the 6- or 7-position by low-molecular alkyl, alkoxy, methylsu'lfonyl groups or halogen atoms, Z-hydroxynaphthalene -4-, -5-, -6- or l-s'ulfonic acid amide and its derivatives, 1-acylamino-6- or -7-hydroxynaphthalenes substituted on the nitrogen atom; (a) pyrazo-' lones such as 1 -ary1,3:alkyl-5-pyrazolones and theirile Patented Dec; 25,1956

1 nite rivatives carrying further substituents in the aryl nucleus, l-aryl--pyrazolone-3-carbonic acids or carbonic acid amides; (d) acetoacetylaminoalkanes, benzenes or -naphthalenes.

Suitable monoazo compounds of general Formula C are e. g. the products obtained by coupling the diazo components named in the preceding paragraph with 2- aminonaphthalene, 2-aminoalkylsulfonylnaphthalenes or Z-aminonaphthalene sulfonic acid amides.

For converting into the metal complex compounds, the mixtures of the disazo compounds of general Formula A and the monoazo compounds of general Formula B or C are to be chosen in such a way that at least 1 mol of a water-soluble disazo compound of general Formula A is contained in 2 mols of the mixture of azo components.

The metallisation of the mixtures of azo components is carried out preferably with chromium salts, e. g. chromic fluoride, chromic sulfate, chromic acetate, chromic formiate, chromic potassium sulfate or chromic ammonium sulfate, or with cobalt salts, e. g. cobaltous acetate, cobaltous formiate or cobaltous sulfate, in aqueous suspension or solution or in an organic medium, e. g. in formamide or in the molten liquid of an alkaline salt of a low-molecular aliphatic monocarbonic acid. Metallisation can be carried out very advantageously in an aqueous or alkaline medium, in which the chromium salts are applied in the presence of compounds which are capable of combining in an alkaline medium with the other components present to form soluble complex compounds, e. g. tartaric, citric or lactic acid., Chromates, e. g. sodium chromate, potassium chromate or potassium bichromate, may also be employed to excellent efiect for the metallisation of the azo compounds; for this purpose a strongly alkaline medium, possibly containing additions of reducing sub- 4 amino-7-hydroxynaphthalene and 17.8 parts of the monoazo compound obtained by coupling diazotised 2- aminobenzene 1 carbonic acid with 1 (3' chloro)- phenyl-3-methyl-5-pyrazolone are mixed with 6 parts of sodium hydroxide in 1200 parts of water. To this are added 250 parts of a 15% aqueous solution of l-hydroxybenzene-Z-sodium carbonate containing 2.6 parts of chromium in complex combination. The mixture is boiled in a reflux condenser until the starting compounds are no longer indicated. The chromium complex compound thus formed is precipitated from the solution by addition of sodium chloride, and -is then filtered off, dried and ground. It consists of a mixture of chromium-containing azo dyestufis, the integrative component of which is the asymmetrical 1:2 chromium complex compound corresponding to the formula Gram and the other components being the respective symmetrical 1:2 complex compounds corresponding to the formulae stances, is used. In cases where the azo compounds contain the methoxy group as a complex-forming group, metallisation is carried out preferably in organic solvents, e. g. glycols such as ethylene glycol, ethyl polyglycol, butyl polyglycol, and in the presence of acid-binding agents, for example sodium acetate.

The resulting metalliferous azo dyestuffs are precipitated from aqueous solution, if necessary after pouring the organic metallising solution into Water, and are filtered ofi, if need be Washed, and finally dried.

The mixtures of metalliferous azo dyestufls obtained according to the present invention are readily soluble in Water and dye wool, leather and synthetic nitrogenous fibers in clear shades of very good fastness to light, washing and milling. In comparison with the pure symmetrical metal complex compounds of disazo dyestuffs corresponding to general Formula A, the mixed metal complex compounds described here are chaarcterised by more interesting shades, e. g. clear greens and browns.

The following examples illustrate the invention Without limiting its scope. All parts and percentages are by weight; temperatures are in degrees centigrade.

EXAMPLE 1 28.9 parts of the disazo compound obtained by coupling diazotised 3-amino-4-hydroxy-1.'1'-azobenzene-3- sulfonic .acid amide with -l-carbo-(2-ethoxy)-ethoxy- N------Or ii NH-O o-o-oun-o 03H! pound of l-hydroxybenzene-Z-sodium carbonate is obtained in the following way: 28.9 parts of chromic ammonium sulfate, corresponding to 7.6 parts of chromo- ,(,I I,I)-0xide, are dissolved in parts of water at 40.

After an addition of Zparts' 'of sodium hydroxide the mass is agitatedl until 1116; precipitate produced at; the start' ihas beenwre=dissolyedt Then 27:6- parts-ofv 1- hydroxlybenzene z-carbonic acid are stirred in and the temperature raised to 90 The pHivalue ofsthe mixture -is ladjustedtto 8 .by an; addition-f. about parts of sodium hydroxide upon. which the massdissolves. to giveasqlution of dark-green color-.-- -The. volume is made;

upr,to 0. partstand the solution t allowed to cool EXAMPLE 2 a compoundobtained by coupling; diazqtisem 3 -aminmZ-hydroxy-S-methyl-1;1 '-azobenzene- 3 jfoniict acid: amidelrwith 2-hydroxynaphthalene and 17. 1, parts of. theamonoazo compound produced from diazotised 2 amino-1 liydrpxy-Qcholorobenzene and ,1- acetylamino-7 hydroxynaphthalene are mixed in 300 parts of formamide. After an addition of 25 parts of chromic ammonium sulfate the suspension is heated to 90-100 until such time as asolu'tion is formed in which the starting compounds are no longer indicated. The

chromium complex compound so formed is precipitated by diluting the mixture with 600xparts of a 20% sodium chloride solution, filtered off, dried and ground. It consists of a mixture of chromium-containing azo dyestufis, the integrative component of which is the asymmetrical 1:2 chromium complex compound corresponding to the formula and the other components being the respective symmetrical 1:2 chromium complex compounds" corresponding to the formulae and [ I oir;

It is a dark-colored powder which dyes wool-, leather and synthetic polyam'ide and polyurethane fibers in blue shades.

EXAMPLE 3 22.3 parts of the disazo compound of diazotised 3- amino-Z-hydroxy-S methyl 1,1 azobenzene-3-sulfonic acid amide and 2-hydroxynaphthalene, 18.3 parts of the monoazo compound obtained by coupling diazotised 2- amincs' I tIydroXy-S-nitrobenzene with 1-acetylamino-7- hydoxynaphthalene, and 8 parts of sodium hydroxide are brought into a fine dispersion in 1000 parts of water at A mixture of 14.2 parts of crystallised cobaltous sulfate, partsof a 3% aqueous tartaric acid solution and 184 parts of a 30% sodium hydroxide solution are added dropwise. After 30 minutes agitation the cobalt complex compound thus formed is precipitated by an addition of sodium chloride, and is then filtered ofi, dried and ground. It consists of a mixture of cobalt-containing azo dyestufis, the integrative component of which is the asymmetrical 1:2 cobalt complex compound corresponding to the formula V and the other components being the respective symmetrical 1:2 cobalt complex compounds corresponding to the formulae 8 EXAMPLE 4 22.3 parts of the disazo compound obtained by-coupling diazotised 3-amino-4-hydroxy-1,1-azobenzene 3'-sulfonic acid amide with 2-hydroxynaphthalene and 20.6 parts of 5 monoazo compound obtained from diazotised Z-amino-lhydroxybenzene-4-sulfonic acid amide and l-acetoacetylamino-2 -ethylhexane are dissolved with 4 parts of sodium hydroxide in 2000 parts of water at 80, 10 parts of 7 sodium acetate and 15 parts of crystallised cobaltous sul- N 7 10 fate are subsequently added and the mass stirred until OH|-OONH N l NH-00-0HS the starting compounds are no longer indicated. The

cobalt complex compound so formed is precipitated from 0 the solution by an addition of sodium chloride, and is h I m tive component of which is the asymmetrical 1:2 cobalt complex compound corresponding to the formula HaNO1S O O and the other components being the respective symmetrical 1:2 cobalt complex compounds corresponding to the formulae 7 subsequently filtered off, dried and ground. It consistsof a mixture of cobalt-containing'azo dyestufls, the integra-' Table-Continued EX Q D V) 23. 1 3-amino 2 -hydroxy-5- methyl-1, 1- azoben- 22 2 amino 1 hydroxy 5 nitrohenzene 1 Or blue.

Zcne-3'-su1fonic acid amide 2-hydroxycarho -(2-propoxy) -ethoxyamino-7-hynaphthalene. droxynaphthalene.

23.1 do 22 do C0 Do.

23.1 do. 18.3 2-amino-1-hydroxy-4-nitrobenzene l-acet- Or greenish blue.

ylamino-7-hydroxynaphthalene.

11.2 do 24.9 1-(3-a.mino-4'-hydroxy -phenyl-azonaph- Co brown.

. thalene-t-sulfonic aci 2-hydroxynapha ene. 24. 9 1 (3-amino-4-hydroxy) -pheny1-azonaph- 17.8 2 aminobenzene 1 carbonic acid--) 1 3 Or Do.

gifialene-i-sulfonic acid- 2-hydroxynaphchloro)-phenyl-3-methyl-fi-pyrazolone.

a ene. 24. 9 do 2-amino-1-hydmxy-4-chloro-5-nitrobenzeneal- Or Do.

. acetylamino-7-hydroxynaphthalene.

21. 1 3 amino 4 hydroxy 1.1 azobenzene 2 16. 9 2-amino-1-hydroxy-4-nitrobenzene 1-(3- Or Do.

hydroxynaphthaleneA-suiionic acid. chloro) -phenyl-3-methyl-fi-pyrazolone.

28. 9 3-amino-4-hydroxy-1.l-azobenzene-3-sulfon- 13.3 2-aminobenzene-1-carbonic acid 1-(3-chlo- Cr green.

ic acid amide 1-carbo-(2-ethoxy)-ethoxyro)-phenyl-3-methyl-5-pyrazolone. amino-7-hydroxynaphthalene.

6 2-amino-1-carhoxybenzeneqfi-sulionic acid phenylamide-n-(3'-chloro)-phenyl-3-methyl-B-pyrarolone.

27 28.9 3-amino-4-hydroxy-1.1-azobenzene-3-sulion- 34.8 2-amino-1-h droxy-4'-nitrobenzene 1- Co brown.

10 acid amide 1-carbo-(2-methoxy)- aeetoacety aminohexane; ethoxyamino-7-hydroxynaphthalene. a

28 22.3 3-aminm4-hydroxy-1.1-azobenzene-3-sulfon- 17. 8 2-amino-1-hydroxy-4-chiorobenzene 1- 01' black.

is acid amide- 2-hydroxynaphthalene. 'acetylamino-7-hydroxynaphthalene.

29 22. 3 do 21. 8 z-amino-l-hydroxybenzeneA-sulfonic acid Or Do.

dimethylamlde 1 acetylamlno 7 -hydroxynaphthalene; t 30 22.3 do 17.8 2- obenzene-I-carbonie acid-)l-(W-chlo- Cr khaki.

. r0)-phenyl-3-methyl-5-pyrazolone. Y 31 22.3 rin 18.7 2-'amlno-l-carboxybenzene-B-sultonio acid Or Do.

incthylamide- 1-phenyl-3-methyl-5-pryaz- 0 one.

32"; 24. 6 3-amino-4-hydroxy-1.1-azobenzene-3-sulfon- 18. 7 do Or Do.

10 acid (2'-hydroxy)-ethylamide 2-hydroxynaphthalene.

33 23. 1 3-am1no-4-hydroxy-1.1'-azobenzene-4-sulfon- 18.7 do Or Do.

10 acid methyl-amide-fl-hydroxynaphthaone.

EXAMPLE 34 and the other components being the respective symparts of wool in hank form, well wetted out, are entered into a solution of 0.5 part of the concentrated chromiferous dyestufl obtained according to Example 1 in 1500 p'artsof water at 40,con'tained in'a porcelain beaker of 2 litres capacity. The bath is heated to'boiling point over 30 minutes, the material being 'tumed frequently. After a further 30 minutes at the'boil the dyebathis given 0.5 part of acetic acid 10%and 'the wool dyed for about..30 minutes at boiling temperature until the dyestutf has completely exhausted onto the fiber. The wool hank is then removed, rinsed .well in coldwat er and dried. It is dyed in a green shade. 1

When 50 parts of yarn of nylon in hank form is used instead of wool, and the dyestuif applied in the same way, a green shade is obtained on complete exhaustion of' the dyebath. Y

A representative mixture of metal-containing azo dyestuiis is that of Example 30 the integrative component of which mixture is the asymmetrical 1:2 chromium complex compound corresponding to the formula KIN-0a metrical 1:2 chromium complex compounds correspond ing to the formulae HaN-OaS O O I S Os-NH: N I 0 i Oil 0 and @000 000 ll i .HQO Or .011: .5.1 als N-L-or: 0- --N hromiumontaining, azo idy smfi corre- We claim: a 1. A composition of matter consisting of at 1e t one sponding to the iorm la,- asymmetrical metal-containing azo dyestuflcorresponding to the formula a and the respective symmetrical metal-containing azo i i 1 dyestuffs corresponding to the formulae. I I

and the respective;symmetricalchromium-containing azo y--Me=y and z---Me=z dyestufis corresponding to the formulae HaN-Oz I O O SOPNHl 1 s Cr N Htqo-mm-o-o o-HN 1i NH-O -0-02Hr-0 02H:

wherein I and R1 stands for the radical of a diazo component selected from the group consisting of the benzene and naphthalene series,

Rz -OH stands for the radical of anazo component selected from the group consisting of' hydroxy henzenes,

' hydroxynaphthalenes, pyrazolon'es, acetoacetic, acid alkylamides and acetoacetic acid arylamides,

Me stands for a trivalent metal atom selected from the group consisting of a trivalent chromium atom and a trivalentwcobalt atom, A

w stands for a member selected from the-group consisting of hydrogen; and methyl,

x stands for at least one water-solubilising group selected from the group consisting of sulfonic acid, carboxyl, alkylsulfonyl, sulfonic, acid amide, sulfonic acid lower alkylamide and sulfonicacid lower hydroxyalkylamide groups, v

2 stands for a radical selected from the group consisting 12 9 of t confistmg 0f the l of the radical of a disazo' compound difierent from 93 l the radical y but having the same general formula d i and the-radicalxof a monoazo compound which corresponds to the formula wherein R3 stands for the radical of a diazo component of the benzene series, free from sulfonic acid groups and containing in the ortho-position to the N=N group a substituent capable of forming metal complex 65 1 compounds, and R4 stands for the radical of an azo component selected from the group consisting of hydroxybenzenes, hydroxynaphthalenes, parazolones, acetoacetic acid alkylamides, acetoacetic acid arylamides and Z-aminonaphthalenes, free from sulfonic acid 'zo groups and containing the N=N group inneighlgouring position to the phenolic and enolic hydroxy group and the amino group respectively, and wherein the two O atoms stand in ortho-position to the azo-group. 2 The composition of matter consisting of the IIIH-O 0-011:

16 I and the respective symmetrical cobalt-containing azo dyestufis corresponding to the formulae 1'5 and the respective symmetrical chromium-containing azo dyestufis corresponding to the formulae m m e m m 4 m "w h 0 m m m m w m s 1 m m n W 0 m m m N "W m o N N. m c u u E 0 r g 0 0 NH N w m.\ O o o W m t \Iih 0 m n 0 0 e o o M m 0 lfw N N. o w n m N N O. V 0 d m N O .1 Q L\ em o m II/ 1 m i w w mm n e m M S NHNIIOHO Mme .m LU LU mm r Y N d s 0 52 0 0 E m w N- E M m. H 5 m w w n N H a w m r 1 "H "w o o HaC-(OHDr-H NH-O 0-011;

and

4; The composition I of matter consisting of the 55 asymmetrical cobalt-containing azo dyestufi corresponding to the formula dyestuffs corresponding to the formulae HOasgN N m m i w NHW -CHO W 0.9 M 0 .1 w u /M m o m I a 0 d O I o /H o m A N W0 E N 1 O a. w m a w w w w M O u mm m g s s m a J H w wa NO h n a N 0 f 0 w 4 m c Nrmflw w N m l 1 H a m o m o N .m m w m .m 0 n 0 .m W 0 u m s 0 /P\ NHN. m d /M. r O O .w \nlirllfi O m 0 M m m m o /u\ m g o W .m u r a n m O N N /n m N N m 0 0 m m m m w N m m A e fi m N .W m. a p m m m m m mm m 6. e a m and ing to the formula and the respective symmetrical chromium-containing azo dyestufis corresponding to the formulae 

2. THE COMPOSITION OF MATTER CONSISTING OF THE ASYMMETRICAL CHROMIUM-CONTAINING AZO DYSTUFF CORRESPONDING TO THE FORMULA 